<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像 -->
      <div class="avatar_box">
        <img src="@/assets/avatar.jpg" alt="" />
      </div>
      <!-- 表单 -->
      <el-form :model="loginForm" :rules="loginFormRules" ref="loginFormRef" label-width="0px" class="login_form" @keyup.enter.native="login">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input type="text" prefix-icon="el-icon-user-solid" v-model="loginForm.username"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input prefix-icon="el-icon-lock" v-model="loginForm.password" show-password></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  name: 'Login',
  data() {
    return {
      // 登录表单数据源
      loginForm: {
        username: '',
        password: '',
      },
      // 登录表单的验证规则
      loginFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' },
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 16, message: '长度在 6 到 16 个字符', trigger: 'blur' },
        ],
      },
    }
  },
  methods: {
    // 重置表单
    resetLoginForm() {
      this.$refs.loginFormRef.resetFields()
    },
    // 登录
    login() {
      // 登录前预验证
      this.$refs.loginFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        // console.log(res)
        if (res.meta.status !== 200) {
          this.$message.error(res.meta.msg)
        } else {
          this.$message.success(res.meta.msg)
          const token = res.data.token
          window.sessionStorage.setItem('token', token)
          this.$router.push('/home')
        }
      })
    },
  },
}
</script>

<style scoped lang="less">
.login_container {
  background: url(@/assets/login-bg.jpg);
  height: 100%;
  .login_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0px 0px 10px #caf;
    .avatar_box {
      height: 130px;
      width: 130px;
      position: absolute;
      left: 50%;
      transform: translate(-50%, -50%);
      border-radius: 50%;
      border: 1px solid #eee;
      box-shadow: 0 0 10px #ddd;
      background-color: #eee;
      img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
      }
    }
  }
  .login_form {
    width: 100%;
    padding: 0 20px;
    position: absolute;
    bottom: 0;
    box-sizing: border-box;
  }
  .btns {
    display: flex;
    justify-content: end;
  }
}
</style>
